MINUTE 8TRUCTDRE. 



65 



connected with the (X-curreuce of a heavy laiu-fall, which we know to 

 be the case in its native liome, and also exposure to direct sunlight. 

 Fig. 5 is a fragment oi the upper epidermis and underlying cells 

 magnified 200 diameters to sliow the structure more clearly. 



Fig. 6. Transverse section of leaf of Lvlia irurpuruta across the midrib, enlarged 40 diameters. 



1, upper, 2, lower epidermis, both with thickened cuticle ; .3, parenchyma or soft tissue (mesophyll), containing 



chlorophyll granules (not shown in ligure) ; i, large vascular bundle of the midrib ; 5, two smaller vascular 



bundles parallel with the midrib ; 6, smaller vascular bundles (veinlets). 



Fig. 6, Lidia purpurata. The thickened cuticle and elongated cells 

 filled with chlorophyll imply a greater exposure to direct sun-light, and 



Fig. 7. Transverse section nf leal of OdonloglossuM crispum at midrib, enlarged JO diameters. 

 The numerals as before. 



the smaller hypoderm , or water cells a shorter duration of the rainy 

 sea.son than in the case of Caft/ei/a Mosshe, the other circumstances 

 remaining much the same. 



